Basically, there is no proper font rendering on a screen, only compromises. People who are used to the Apple approach (visual correctness) will think it looks better, people who are used to the Microsoft approach (crispness and readability) will think it looks better, etc...

GNOME 2 allowed you to choose which rendering algorithm you prefer, which was a nice touch even though the dialog was confusingly worded. Don't know if the feature is still there in GNOME 3